im trying to get latitude and longtitude from google map by giving address. But its giving error.when i directly copy url to browser url bar.its giving correct result.If anybody know the answer .Plz reply. Thanx in advance Here is my code.

<?php 
$key = '[AIzaSyAoPgQlfKsBKQcBGB01cl8KmiPee3SmpU0]';

$opt = array (
'address'   => urlencode('Kolkata,India, ON') ,
'output'    => 'xml' 
);

$url = 'http://maps.google.com/maps/geo?q='.$opt['address'].'&output='.$opt['output'].'&oe=utf8&key='.$key;

$dom = new DOMDocument();
$dom->load($url);

$xpath = new DomXPath($dom);
$xpath->registerNamespace('ge', 'http://earth.google.com/kml/2.0');

$statusCode = $xpath->query('//ge:Status/ge:code');

if ($statusCode->item(0)->nodeValue == '200') {

$pointStr = $xpath->query('//ge:coordinates');
$point = explode(",", $pointStr->item(0)->nodeValue);

$lat = $point[1];
$lon = $point[0];

echo '<pre>';
echo 'Lat: '.$lat.', Lon: '.$lon;
echo '</pre>';
}

?>

Following error has occured:

Warning: DOMDocument::load(http://maps.google.com/maps/geo?      q=Kolkata%252CIndia%252C%2BON&output=xml&oe=utf8&key=%5BAIzaSyAoPgQlfKsBKQcBGB01cl8KmiPee3SmpU0%5D) [domdocument.load]: failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request in C:\xampp\htdocs\draw\draw.php on line 19

Warning: DOMDocument::load() [domdocument.load]: I/O warning : failed to load external entity "http://maps.google.com/maps/geo?q=Kolkata%252CIndia%252C%2BON&output=xml&oe=utf8&key=%5BAIzaSyAoPgQlfKsBKQcBGB01cl8KmiPee3SmpU0%5D" in C:\xampp\htdocs\draw\draw.php on line 19

Notice: Trying to get property of non-object in C:\xampp\htdocs\draw\draw.php on line 26